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The voltmeter shown in figure reads 18V ...

The voltmeter shown in figure reads 18V across the `50(Omega)`resistor. Find the resistance of the voltmeter.

A

`75 Omega`

B

`120 Omega`

C

`(800)/(7) Omega`

D

`(900)/(7) Omega`

Text Solution

Verified by Experts

The correct Answer is:
D
(d) `I = (12)/(24) = (1)/(2) A, I_(1) = (18)/(50) A`
`I_(2) = I - I_(1) = (1)/(2) - (18)/(52) = (7)/(50) A`
`R_(V) = (18)/(I_(2)) = (18)/(7 // 50) = (900)/(7) Omega`
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